(CNN) -- A man apparently angry over a poor performance evaluation entered an Ohio State University maintenance building early Tuesday and opened fire, killing a manager before turning the gun on himself, police said. Larry Wallington, 48, a building services manager at the OSU Maintenance Building, was pronounced dead at the scene of the 3:30 a.m. ET shooting, Ohio State University Police Chief Paul Denton said. Wallington was a 10-year university employee, he said. Authorities found suspect Nathaniel Brown, 51, a custodial worker, suffering from a self-inflicted gunshot at the scene, Denton said. He was transported to the Ohio State University Medical Center, where he was dead on arrival.

Officials would not say when
Nathaniel Brown received the review, who gave it to him or provide further details, citing the ongoing investigation.